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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2412.07185 |
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| _version_ | 1866911298303819776 |
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| author | Mehdi, Zain Vaidya, Varun D. Savill-Brown, Isabelle Grosser, Phoebe Ratcliffe, Alexander K. Liu, Haonan Haine, Simon A. Hope, Joseph J. Viteri, C. Ricardo |
| author_facet | Mehdi, Zain Vaidya, Varun D. Savill-Brown, Isabelle Grosser, Phoebe Ratcliffe, Alexander K. Liu, Haonan Haine, Simon A. Hope, Joseph J. Viteri, C. Ricardo |
| contents | Quantum logic operations between physically distinct qubits is an essential aspect of large-scale quantum information processing. We propose an approach to high-speed mixed-species entangling operations in trapped-ion quantum computers, based on mechanical excitation of spin-dependent ion motion by ultrafast pulsed lasers. We develop the theory and machine-design of pulse sequences that realise MHz-speed `fast gates' between a range of mixed-isotope and mixed-species ion pairings with experimentally-realistic laser controls. We demonstrate the robustness of the gate mechanism against expected experimental errors, and identify errors in ultrafast single-qubit control as the primary technical limitation. The proposed mixed-species gate mechanism can be used for fast transfer of quantum information between specialized qubits and quantum memories, which we show enables the protection of matter-photon interfaces against rapid spin dephasing in optical networks of trapped-ion processors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_07185 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Fast mixed-species quantum logic gates for trapped-ion quantum networks Mehdi, Zain Vaidya, Varun D. Savill-Brown, Isabelle Grosser, Phoebe Ratcliffe, Alexander K. Liu, Haonan Haine, Simon A. Hope, Joseph J. Viteri, C. Ricardo Quantum Physics Quantum logic operations between physically distinct qubits is an essential aspect of large-scale quantum information processing. We propose an approach to high-speed mixed-species entangling operations in trapped-ion quantum computers, based on mechanical excitation of spin-dependent ion motion by ultrafast pulsed lasers. We develop the theory and machine-design of pulse sequences that realise MHz-speed `fast gates' between a range of mixed-isotope and mixed-species ion pairings with experimentally-realistic laser controls. We demonstrate the robustness of the gate mechanism against expected experimental errors, and identify errors in ultrafast single-qubit control as the primary technical limitation. The proposed mixed-species gate mechanism can be used for fast transfer of quantum information between specialized qubits and quantum memories, which we show enables the protection of matter-photon interfaces against rapid spin dephasing in optical networks of trapped-ion processors. |
| title | Fast mixed-species quantum logic gates for trapped-ion quantum networks |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2412.07185 |